2018/01/31 by Giovanna Cottin, G. Cottin
Physics and Astronomy · #Astrophysics #Computer science #Dark Matter and Cosmic Phenomena #Dark matter #Daughter #Event (particle physics) #Geology #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Particle (ecology) #Particle physics #Particle physics theoretical and experimental studies #Physics #Theoretical computer science #Vertex (graph theory) #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep03(2018)137
13 pages, 5 figures. v2 includes corrected typos, clarifications on Sec. 3, and extended comments in the Conclusions. Version accepted for publication in JHEP
openalex publication_date 2018/03/01 · arxiv created 2018/03/21 · arxiv updated 2018/04/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
A bstract We propose a simple way to extract particle masses given a displaced vertex signature in event topologies where two long-lived mother particles decay to visible particles and an invisible daughter. The mother could be either charged or neutral and the neutral daughter could correspond to a dark matter particle in different models. The method allows to extract the parent and daughter masses by using on-shell conditions and energy-momentum conservation, in addition to the displaced decay positions of the parents, which allows to solve the kinematic equations fully on an event-by-event basis. We show the validity of the method by means of simulations including detector effects. If displaced events are seen in discovery searches at the Large Hadron Collider (LHC), this technique can be applied.